- Headworks
Telephone headsets and accessory products.
www.headworksheadsets.com
- Telephone Circuit Diagrams
How to rewire your system to set up an intercom system, remote control, phone broadcaster, visual ringer, and others.
www.electronic-circuits-diagrams.com/telephones_circuits.shtml
- HowStuffWorks: How Telephones Work
How the device works, as well as the network it connects to.
www.howstuffworks.com/telephone.htm
- Telephone Ringing Circuits
Wiring diagrams and circuitry info for ring signals.
www.hut.fi/Misc/Electronics/circuits/telephone_ringer.html
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